Conical wood-chip distributor for chemical pulp boilers



June 26, 1928; 1,675,211

E. CASTREN ET AL comm. woon c m? msnusuwon FOR cumucu. PULP BOILERS Filed Oct. 25. 1926 Inventor 1 I Zino Casi/e72, fll'lzal'i 01ml By $22 Patented June 26, 1928.

UNITED STATES PATENT ori ice.

nrfio casmnn Ann EINARI oxsA, or ENsasUom-rmmim.

CONICAL WOOD-CHIP DISTRIBUTOR FOR CHEMICAL PULP BOILERS;

Application filed October 23, 192a, Serial No; 143,728, 'and in Suomi-Finland February 10,1926.

There is a general endeavour to feed the chemical pulp boiler in such a way that the 1 wood chips fed in, are distributed as evenly as possible on the whole transverse surface 6 of the boiler so as to avoid the chips accumulating in heaps, which eventually will break down forming air pockets resulting to an uneconomical utilization of the capacity of the boiler. For this end there are 10 different designs in use.

Our invention has for its object to accomplish the above requirement by means of a new. device, which increases the efliciency of the pulp boiler by 25 to 30%.

On the accompanying drawing Fig. 1 shows the 'device in longitudinal section whereas Fig. 2 is a cross section of same.

When the chip jet has. entered the boiler through the feed opening, it will at a 'distance of about 1 meter from the said opening strike against a conical distributor 1, having for its object to change the direction of 1110- tion of the chips in such a way, that. a portion of the chip mass is directed towards the periphery of the cylindrical boiler. The

cone 1 is supported by three pipes 2 attached to a larger annular pipe 3, which is supported by the intake flange of the boiler and thus carries the whole weight of the distributor. In order to cut down the time required for feeding the boiler there is a vacuum created inside of same efiecting the introduction of the chips at a considerable velocity. The vacuum is created in the known way of lettin steam condensate into'an enclosed vessel. he charging of the boiler according to our invention takes place thus by letting I steam first fill the boiler through a valve at the bottom of the boiler thus expelling the 40 air from same. Steam is hereafter introduced into the distributor through pipes 2 and 3, the wood chips being simultaneously fed in through a hopper 6, which is detachably mounted onto the distributor. The cold 4 chips thuscool off the steam, thus efi'ecting condensation. The vacuum may be regulated by the quantity of steam introduced through the pipe 3. Ha very high vacuum is wanted this ma be created by introducing -cool cooking aci throu 'h the gas valve at the upper inlet of theboiler',

which may also be regulated at will.

In order to get the steam well mixed with the chips, the former is, as mentioned, introduced through the pipes 2 and 3 into a manifold 4 in the lower portion of the distributor 1, from which the steam is pressed out through an opening 5 formed by the mantle of the distributor -1 and thefolded down rim of the manifold 4 thus mixing effectively with the chips sliding down on the conical surface "1.

evenly distribute the charge inside the boiler.

2. A charge distributing apparatus for pulp boilers comprising a-cone suspended at the inlet of a pulp boiler, means whereby a steam pressure is admitted under the cone and adapted to disintegrate the charge at the same time creating a vacuum inside the boiler by condensation, said vacuum further assisting the complete distribution of the charge in the boiler.

3. .A charge distributing apparatus for pulp boilers comprising a fixed cone suspended at the inlet of a pulp boiler and in the path of the charge, a plurality of pipes extending from under the cone to a position outside the boilers inlet said pipes being adapted for connection to a steam supply and arranged to emit a steam charge beneath the cone to facilitate the distribution of the said charge.

In witness whereof we have hereunto set our hands.

EIfiO GASTREN. EINARI OKSA. 

